Re: Are the uBITX receivers ripe for improvement? -- And some other miscellaneous thoughts.
Bo,
I was thinking about using my SDR Play 2 behind the bandpass filters of the uBITX and powering it with either an RPi3 or an old 2.5 GHz ATOM.? The latter would give me choices for logging and support software either using Windows or Linux.? I might even use both with the RPi3 running the SDR Play 2 and the ATOM running logging, spotting, antenna and station control, etc.? The ATOM is a Jetway with lots of serial, parallel, USB and even GPIO.? It also has decent video and disk controllers on board with a modest power requirement.
I have run mine with a SSD and a 9-16V ATX power supply module which is good for portable operation.
Lots of choices!
73,
Gordon Beattie W2TTT
201.314.6964
From: Bo Barry
Sent: Sunday, May 13, 6:38 PM
Subject: Re: [BITX20] Are the uBITX receivers ripe for improvement? -- And some other miscellaneous thoughts.
After listening to mine today on FT8 ?I'd say the RCVR I'd just fine. Or mighty fine!
It's been a joy listening to CW, SSB, & FT8 ?today.
I have problems on the transmit for another post.
Definitely interesting for projects with the pi and ubitx.
Bo W4GHV?
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Re: UBITX Assemly Wiki Page
#ubitx
One small point.?
If your using diode for reverse polarity protection it is better to place the
fuses BEFORE the diode as then the fuse blows and the diode is less
likely to be fried and also down stream circuits.
Allison
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Re: UBITX Assemly Wiki Page
#ubitx
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On Sun, 5/13/18, W7PEA <patrick@...> wrote: Subject: Re: [BITX20] UBITX Assemly Wiki Page #ubitx To: [email protected] Date: Sunday, May 13, 2018, 8:35 PM I updated the Assembly page with pictures, no making fun of my soldering. ;-) I could use help with two things as I did not do a vanilla installation of these two. 1. The microphone? 2. The Keyer If you did a no-modification build, please snap some pics and post them or send them to me and I'll do it. Thanks! W7PEA
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Re: ubitx 9 bands in 1 day
Great job!?
I work qrp also.looking forward to rebuilding my antennas. Several years ago I qualified for the 1000 mile a watt award.
But I was using an Argonaut 509. Great job!
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On Sun, 5/13/18, Tom Christian <tmchristian@...> wrote: Subject: [BITX20] ubitx 9 bands in 1 day To: [email protected] Date: Sunday, May 13, 2018, 8:51 PM The uBITX continues to be great fun!? As per the attached logbook snapshot, I was able to work 9 bands in 1 day last week with 10 meters through 80 meters.? The contact on 10 meters was only a quarter watt on the power meter but a contact is a contact!......:)? I don't yet have 160 meters up and running so I couldn't try for 10 bands.? The uBITX results continue to amaze me!? Great rig! Tom AB7WT
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Re: UBITX Assemly Wiki Page
#ubitx
Hey Bo,?
According to all drawings and the HFSignals wireup page:
I hope that helps
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Should work fine.
Note that the Nano has an FT232RL USB-to-serial chip that includes a 5v to 3.3v regulator.?
This currently powers the si5351 through the Nano's J2 pin 14.? On the clones, it's CH340 chip.
? ??
You will need to replace that regulator with something else if you remove our CH340 chip.
This new 3.3v regulator could be mounted on the Raduino board.
Jerry
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On Sun, May 13, 2018 at 06:21 pm, Nick VK4PLN wrote:
I was wondering something similar, to remove the USB section of the Arduino Nano to clean up any birdies caused by it.. thoughts?
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Re: UBITX Assemly Wiki Page
#ubitx
Can you verify that the orange PTT goes to the sleeve? It is shown to the tip on the Randino schematic I found
Bo W4GHV
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I was wondering something similar, to remove the USB section of the Arduino Nano to clean up any birdies caused by it.. thoughts?
Nick VK4PLN
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The uBITX continues to be great fun!? As per the attached logbook snapshot, I was able to work 9 bands in 1 day last week with 10 meters through 80 meters.? The contact on 10 meters was only a quarter watt on the power meter but a contact is a contact!......:)? I don't yet have 160 meters up and running so I couldn't try for 10 bands.? The uBITX results continue to amaze me!? Great rig!
Tom
AB7WT
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Re: UBITX Assemly Wiki Page
#ubitx
I updated the Assembly page with pictures, no making fun of my soldering. ;-)
I could use help with two things as I did not do a vanilla installation of these two.
1. The microphone?
2. The Keyer
If you did a no-modification build, please snap some pics and post them or send them to me and I'll do it.
Thanks!
W7PEA
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Re: Broadband HF Folded Dipole Antennas
I really need to purchase EZNEC or something similar, because I need to be able to run some reasonable simulations.
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On May 13, 2018, at 18:41, Gordon Gibby <ggibby@...> wrote:
Thanks, Allison!
On May 13, 2018, at 14:26, ajparent1/KB1GMX <kb1gmx@...> wrote:
r
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Re: BITX QSO Afternoon/Evening, Sunday, May 13, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
On Sun, May 13, 2018 at 04:37 pm, Tom VE3THR wrote:
they are starting to come out of the woodwork. Hearing stations from Nova Scotia VE1ESP to Alabama.
I hear one other station intermittently. Lots of QRN here. ? -- John - WA2FZW
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Re: BITX QSO Afternoon/Evening, Sunday, May 13, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
they are starting to come out of the woodwork. Hearing stations from Nova Scotia VE1ESP to Alabama.?
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Re: Buyer beware! RD16HHF1
Bear in mind,....? ?sometimes when you buy RD16HHF1 fets? from EBay, China... you don't always get what you expect,.......
Sent from Samsung tablet.
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-------- Original message -------- From: K9HZ <bill@...> Date: 13/05/2018 22:07 (GMT+00:00) Subject: Re: [BITX20] Buyer beware! RD16HHF1
Much of it is already captured on UBITX.net ? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: Like us on Facebook! ? Moderator ¨C North American QRO Group at Groups.IO. ? email:? bill@... ? ? ? ?I don't know if y'all have already done that....but writing up a little "white paper"" and putting it on the web site about little bite-size improvement steps like going to the RD16HHF1 for example, would make very helpful little bite-sized projects.? ? Again, you may have already done all that. ? I'm submitting gerber files right now to get my cheap homebrew soundcard-interface done as prototype batch?--- it is very similar to the EasyDigi but includes gain potentiometer trimmers and a RELAY for the push to talk, LED ptt indicator.? ??If it works....it will be freely available.? ?The previous (expensive-PCB-company-version) went through about 40 [expensive]??copies locally and elsewhere and many are 24/7/365 in service).? ? You guys have taught me a lot!!!! gordon ? ?
Also, keep in mind that if you plan to move from the IRF510 to the RD16HHF1,?
the uBitx final should have some adjustments to the transformer ratios and such.
The RD16HHF1 is not quite a drop in replacement.
Jerry
On Sun, May 13, 2018 at 09:17 am, Jerry Gaffke wrote: Allison has quite a few posts here.
None have discouraged experimentation with the IRF510's.
Quite the contrary.
She did however suggest you get your RF parts from reliable vendors,
be they IRF510's or RD16HHF1's.
Jerry . . . ?
On Sun, May 13, 2018 at 08:54 am, Russ Hines wrote:
Gents and ladies, I don't post much as I'm a busy broadcast engineer.? But I try to read often.
Allison's post contains wisdom.
Education tends to be expensive.? If your goal is IRF R&D, then knock yourselves out.? You will go through a lot of parts, and likely as not, spend a lot more time and money in acquiring the knowledge and experience.? In the end, you'll know what a part can or cannot do.? If that's YOUR goal, great.
For myself, my time is worth something to me.? I think it's false economy of both my time and money to blow up a few dozen $0.50 parts, chasing issues created by the selection of an inferior part from an unreliable source, when one appropriately selected and sourced $4.75 part will accomplish MY goal - to use a piece of equipment that I built.? The former is not worth the hassle.
If you need a cliche, here's two:? I'd like to "not reinvent the wheel," but would much rather "stand on the shoulders of giants."
Two cents duly submitted.
73,
Russ Hines
WB8ZCC
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Reply to: russ@.
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Re: using the BITX on RTTY
Hans, would it be possible to pull the crystals in a filter using the LED or Zenor Varicap diodes??
-Justin N2TOH?
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CAT question, audio connection for digital, residual signal observed on waterfall of Icom 7300
#ubitx
#ubitx-help
#ft8
I setup for the FT-817 38400 baud and do have transmit control. Am I supposed to have more (frequency control, etc) with fldigi & wsjtx or just transmit/PTT control??
I see a conflict on two schematics for the PTT and MIKE connections on the jack. Does the orange PTT go to the tip or sleeve??
It also goes into transmit when I turn up the audio gain on the external usb sound card. I can hear the modulation signal in the headphones but all I have is a rough signal at the dial frequency visible on my Icom receiver, with the RF gain turned way down.
Work with the o'scope is next.? ?It does appear to work fine on CW with a paddle, so the thought of a QSO excites me. :)
Ideas appreciated.
Bo W4GHV
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Re: BITX QSO Afternoon/Evening, Sunday, May 13, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
I'm on with Tom, VE3THR with pretty good signals! Anyone else on?
--
John - WA2FZW
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How to change the default power-on 7.150 MHz frequency on ?BITX
I wanted?my???BITX?to power-on on our club meeting frequency, instead of having to navigate to it?every time. ?Couldn't find any documentation on how to
set the default frequency?which is (was) 7.150 MHz. ?
Found this trick by accident, it might be documented, but just in case, here it is.
- turn on the radio;
- set the desired frequency on VFO A;
- set menu option: VFO B;
- turn off the radio whilst on VFO B?et voil¨¤.
You can also set the default VFO B frequency by selecting the VFO B frequency and turning off the radio on VFO A.
Yves vk2auj
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www.mwrs.org.au
Just had to build one of these www.hfsignals.com/index.php/ubitx/.. I used to have a KX3, but what I really wanted was a lunch box radio I could just leave on the ground outside.
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Re: Are the uBITX receivers ripe for improvement? -- And some other miscellaneous thoughts.
After listening to mine today on FT8 ?I'd say the RCVR I'd just fine. Or mighty fine!
It's been a joy listening to CW, SSB, & FT8 ?today.
I have problems on the transmit for another post.
Definitely interesting for projects with the pi and ubitx.
Bo W4GHV?
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Nick VK4PP
Yves Bernier VK2AUJ